LTC3577
LTC3577-1

PRODUCTION

Highly Integrated 6-Channel Portable PMIC

Data Sheet Product Selection Table
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Overview

  • Full Featured Li-Ion/Polymer Charger/PowerPath™ Controller with Instant-On Operation
  • Triple Adjustable High Efficiency Step-Down Switching Regulators (800mA, 500mA, 500mA IOUT)
  • 6μA Battery Drain Current in Hard Reset
  • Bat-Track™ Control for External HV Buck DC/DCs
  • I2C Adjustable SW Slew Rates for EMI Reduction
  • High Temperature Battery Voltage Reduction Improves Safety and Reliability
  • Overvoltage Protection for USB (VBUS)/Wall Inputs
  • Provides Protection to 30V
  • Integrated 40V Series LED Backlight Driver with 60dB
  • Brightness Control and Gradation via I2C
  • 1.5A Maximum Charge Current with Thermal Limiting
  • Battery Float Voltage:
    • 4.2V (LTC3577)
    • 4.1V (LTC3577-1)
  • Pushbutton On/Off Control with System Reset
  • Dual 150mA Current Limited LDOs
  • Small 4mm × 7mm 44-Pin QFN Package

The LTC3577 is a highly integrated power management IC for single cell Li-Ion/Polymer battery applications. It includes a PowerPath manager with automatic load prioritization, a battery charger, an ideal diode, input overvoltage protection and numerous other internal protection features. The LTC3577 is designed to accurately charge from current limited supplies such as USB by automatically reducing charge current such that the sum of the load current and the charge current does not exceed the programmed input current limit (100mA or 500mA modes). The LTC3577 reduces the battery voltage at elevated temperatures to improve safety and reliability. Efficient high current charging from supplies up to 38V is available using the on-chip Bat-Track controller. The LTC3577 also includes a pushbutton input to control the three synchronous step-down switching regulators and system reset. The onboard LED backlight boost circuitry can drive up to 10 series LEDs and includes versatile digital dimming via I2C input. The I2C input also controls two 150mA LDOs as well as other operating modes and status read back. The LTC3577 is available in a low profile 4mm × 7mm × 0.75mm 44-pin QFN package.


 BatTrack Float Voltage
LTC3577 Yes 4.2V
LTC3577-1 Yes 4.1V
LTC3577-3 No 4.2V
LTC3577-4 No 4.1V

Applications

  • PNDs, DMB/DVB-H; Digital/Satellite Radio;
  • Media Players
  • Portable Industrial/Medical Products
  • Universal Remotes, Photo Viewers
  • Other USB-Based Handheld Products
LTC3577
LTC3577-1
Highly Integrated 6-Channel Portable PMIC
LED Driver Efficiency (10 LEDs) Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Analog to Digital Converters (ADCs) 1
LTC2991
RECOMMENDED FOR NEW DESIGNS Octal I2C Voltage, Current, and Temperature Monitor
Battery Monitors & Fuel Gauges 1
LTC2942-1
Obsolete 1A Battery Gas Gauge with Internal Sense Resistor and Temperature/Voltage Measurement
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Protection Switches & Controllers 1
LTC4362-1
LTC4362-2
1.2A Overvoltage/Overcurrent Protector
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Evaluation Kits

eval board
schematic 1
DC1402A-B

LTC3577EUFF-1 Demo Board | PMIC, 3 Bucks, 2 LDOs, Boost, Battery Charger, Etc. 1.6V ≤ VIN ≤ 5.5V, Multiple VOUTs

Buy Now View Details

Product Details

Demo Circuit 1402 is a Highly Integrated 6-Channel Portable PMIC featuring the LTC3577 (DC1402A-A) and the LTC3577-1 (DC1402A-B), which include a push button controller, two 150mA LDOs, three synchronous buck converters (800mA, 500mA, 500mA), a Li-Ion battery charger, a Power-Path controller, and high voltage buck controller interface that allows the board to control a separate LTC high voltage buck converter demo board to drive an LED (included with the demo board). The LTC3577's battery charger has a 4.2V float voltage while the LTC3577-1 has a 4.1V float voltage. The board can be power with a 1.6V to 5.5V DC input supply, a USB input or a 5V wall adapter. Do not look directly at the operating LED as this circuit produces light that can damage eyes.


 


eval board
schematic 2
DC1402A-A

LTC3577EUFF Demo Board | PMIC, 3 Bucks, 2 LDOs, Boost, Battery Charger, Etc. 1.6V ≤ VIN ≤ 5.5V, Multiple VOUTs

Buy Now View Details

Product Details

Demo Circuit 1402 is a Highly Integrated 6-Channel Portable PMIC featuring the LTC3577 and LTC3577-1, which include a push button controller, two 150mA LDOs, three synchronous buck converters (800mA, 500mA, 500mA), a Li-Ion battery charger, a Power-Path controller, and high voltage buck controller interface that allows the board to control a separate LTC high voltage buck converter demo board to drive an LED (included with the demo board). Do not look directly at the operating LED as this circuit produces light that can damage eyes. The board can be power with a 1.6V to 5.5V DC input supply, a USB input or a 5V wall adapter.


 
DC1402A-B
LTC3577EUFF-1 Demo Board | PMIC, 3 Bucks, 2 LDOs, Boost, Battery Charger, Etc. 1.6V ≤ VIN ≤ 5.5V, Multiple VOUTs
DC1402A-A - Schematic
DC1402A-A
LTC3577EUFF Demo Board | PMIC, 3 Bucks, 2 LDOs, Boost, Battery Charger, Etc. 1.6V ≤ VIN ≤ 5.5V, Multiple VOUTs
DC1402A-A - Schematic

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LTC3577
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